nixos/nm-applet: add nm-applet program

nixos/doc/manual/release-notes/rl-1903.xml

@@ -39,7 +39,9 @@
 
   <itemizedlist>
    <listitem>
-    <para />
+    <para>
+     <literal>./programs/nm-applet.nix</literal>
+    </para>
    </listitem>
   </itemizedlist>
  </section>

nixos/modules/module-list.nix

@@ -106,6 +106,7 @@
   ./programs/mininet.nix
   ./programs/mtr.nix
   ./programs/nano.nix
+  ./programs/nm-applet.nix
   ./programs/npm.nix
   ./programs/oblogout.nix
   ./programs/plotinus.nix

nixos/modules/programs/nm-applet.nix

@@ -0,0 +1,43 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.nm-applet;
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    programs.nm-applet = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable nm-applet.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    systemd.user.services.nm-applet = {
+      description = "Network manager applet";
+      wantedBy = [ "graphical-session.target" ];
+      partOf = [ "graphical-session.target" ];
+      serviceConfig.ExecStart = "${pkgs.networkmanagerapplet}/bin/nm-applet";
+    };
+
+  };
+
+}